Recycled Asphalt: Sustainable Infrastructure
As the world moves toward more sustainable infrastructure, Acon Industries is proud to lead the way with a new asphalt plant designed to incorporate up to 30% Recycled Asphalt Product (RAP) - a capability that positions us at the forefront of innovation in New Zealand.
This isn’t just about technology - it’s about aligning with global best practices and responding to the aspirations of partners like the Port of Tauranga, who are actively seeking more environmentally responsible solutions for their road maintenance programs.
Why RAP Matters
Recycled Asphalt Product is created by reclaiming and reprocessing old asphalt materials. When used in new mixes, RAP offers significant benefits:
Reduces greenhouse gas emissions
Preserves landfill space
Cuts costs by reducing reliance on virgin materials
Performs reliably when engineered correctly
How NZ Compares Globally
New Zealand
Under NZTA’s M/10 specification, RAP use is limited to 15% in standard mixes.
Higher percentages (up to 30%) require performance validation and approval from NZTA’s National Pavements Manager.
While research supports the performance of 30% RAP mixes, widespread adoption is still emerging.
United States
No federal cap; Federal Highway Administration (FHWA) encourages RAP use to the maximum practical extent.
Many states allow up to 30% RAP in surface and intermediate layers, and up to 50% or more in base layers.
High RAP mixes (25%+) are supported through field trials and performance-based design.
Germany
A global leader in RAP adoption, with some regions using up to 60% RAP in asphalt mixes.
Strong emphasis on performance-based design and circular economy principles.
RAP use is integrated into national sustainability and waste reduction strategies.
Opportunity for NZ
New Zealand has the opportunity to:
Modernise its specifications to reflect global best practices.
Lead in sustainable infrastructure by embracing higher RAP thresholds.
Support local councils and partners like the Port of Tauranga in achieving their environmental goals.
Reduce reliance on virgin materials and imports, improving cost-efficiency and resilience.
Acon’s new plant is designed to meet this challenge - with the capability to produce high-performance mixes using up to 30% RAP, backed by advanced technology and environmental controls. Together with our partners, we’re building a future where recycled roads are not just possible - they’re preferred.